私有 iOS 框架返回 NULL答案

【问题标题】：Private iOS Framework Returning NULL私有 iOS 框架返回 NULL
【发布时间】：2023-03-09 00:20:02
【问题描述】：

我正在尝试在nst's iOS Runtime Headers 的帮助下在iOS 9.1 下使用BatteryCenter 和CommonUtilities 私有框架。它用于研究目的，不会上架 AppStore。

这是他们各自的代码：

- (void)batteryCenter {
NSBundle *bundle = [NSBundle bundleWithPath:@"/System/Library/PrivateFrameworks/BatteryCenter.framework"];
BOOL success = [bundle load];

    if(success) {
        Class BCBatteryDevice = NSClassFromString(@"BCBatteryDevice");
        id si = [[BCBatteryDevice alloc] init];

        NSLog(@"Charging: %@", [si valueForKey:@"charging"]);
    }
}


- (void)commonUtilities {
    NSBundle *bundle = [NSBundle bundleWithPath:@"/System/Library/PrivateFrameworks/CommonUtilities.framework"];
    BOOL success = [bundle load];

    if(success) {
        Class CommonUtilities = NSClassFromString(@"CUTWiFiManager");
        id si = [CommonUtilities valueForKey:@"sharedInstance"];

        NSLog(@"Is Wi-Fi Enabled: %@", [si valueForKey:@"isWiFiEnabled"]);
        NSLog(@"Wi-Fi Scaled RSSI: %@", [si valueForKey:@"wiFiScaledRSSI"]);
        NSLog(@"Wi-Fi Scaled RSSI: %@", [si valueForKey:@"lastWiFiPowerInfo"]);
    }
}

虽然我找回了类，但它们所有受尊重的值都是 NULL，这很奇怪，因为有些必须是真的，例如我已连接到 Wi-Fi，所以 isWiFiEnabled 应该是 YES。

我的代码没有返回预期的结果究竟缺少什么？它需要权利吗？如果有，具体是什么？

【问题讨论】：

标签： ios iphone-privateapi

【解决方案1】：

在 Swift 中，我设法在没有 BatteryCenter 标头的情况下使其工作。我仍在寻找一种不使用BCBatteryDeviceController 来访问附加电池列表的方法，但这是我迄今为止所做的工作：

斯威夫特 3：

guard case let batteryCenterHandle = dlopen("/System/Library/PrivateFrameworks/BatteryCenter.framework/BatteryCenter", RTLD_LAZY), batteryCenterHandle != nil else {
    fatalError("BatteryCenter not found")
}

guard let batteryDeviceControllerClass = NSClassFromString("BCBatteryDeviceController") as? NSObjectProtocol else {
    fatalError("BCBatteryDeviceController not found")
}

let instance = batteryDeviceControllerClass.perform(Selector(("sharedInstance"))).takeUnretainedValue()

if let devices = instance.value(forKey: "connectedDevices") as? [AnyObject] {

    // You will have more than one battery in connectedDevices if your device is using a Smart Case
    for battery in devices {
        print(battery)
    }
}

斯威夫特 2.2：

guard case let batteryCenterHandle = dlopen("/System/Library/PrivateFrameworks/BatteryCenter.framework/BatteryCenter", RTLD_LAZY) where batteryCenterHandle != nil else {
    fatalError("BatteryCenter not found")
}

guard let c = NSClassFromString("BCBatteryDeviceController") as? NSObjectProtocol else {
    fatalError("BCBatteryDeviceController not found")
}

let instance = c.performSelector("sharedInstance").takeUnretainedValue()
if let devices = instance.valueForKey("connectedDevices") as? [AnyObject] {

    // You will have more than one battery in connectedDevices if your device is using a Smart Case
    for battery in devices {
        print(battery)
    }
}

这个日志：

<BCBatteryDevice: 0x15764a3d0; vendor = Apple; productIdentifier = 0; parts = (null); matchIdentifier = (null); baseIdentifier = InternalBattery-0; name = iPhone; percentCharge = 63; lowBattery = NO; connected = YES; charging = YES; internal = YES; powerSource = YES; poweredSoureState = AC Power; transportType = 1 >

【讨论】：

【解决方案2】：

您需要先访问BCBatteryDeviceController，在成功块执行后，您可以通过它获取所有已连接设备的列表。

这是相同的代码。

Class CommonUtilities = NSClassFromString(@"BCBatteryDeviceController");

id si = [CommonUtilities valueForKey:@"sharedInstance"];

BCBatteryDeviceController* objBCBatteryDeviceController = si;

NSLog(@"Connected devices: %@", objBCBatteryDeviceController.connectedDevices);

【讨论】：